Optical Disc Drive Tray Integration for Signal Loss Reduction
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Solution Overview
Problem
Conventional slim type optical disc drives have limited design freedom due to compatibility requirements with laptop computers, with the optical pickup unit being a complex, integrated element with a metal base, restricting structural modifications and increasing manufacturing complexity and costs.
Innovation Solution
The optical disc drive design includes a tray with a guide shaft and a reciprocally movable optical pickup unit, a spindle motor directly mounted on the tray, and a main printed circuit board connected to the optical pickup unit, reducing the need for a separate base and simplifying the structure, while allowing for improved component placement and reduced signal loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the optical pickup unit is separately mounted on a metal base with guide shafts, then the structural stability is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the optical pickup unit, guide shafts, and metal base into a single integrated assembly. The guide shafts are directly installed on the metal base, and the optical pickup unit is mounted on these guide shafts, forming one unified structure rather than separate components. This integration reduces the number of parts and simplifies manufacturing while maintaining structural stability.
2Stability of the object's composition
If the optical pickup unit is separately mounted on a metal base, then the structural stability is improved, but the manufacturing cost increases
Solution Approach 1:
The patent integrates the optical pickup unit and guide shafts directly onto the metal base as a unified assembly. This merging of components reduces the number of separate manufacturing processes and assembly steps required, thereby lowering manufacturing costs while preserving the structural stability provided by the metal base and guide shaft configuration.
3Loss of energy
If the main PCB is mounted on the housing, then the signal loss is reduced, but the internal space of the tray decreases
Solution Approach 1:
The patent relocates the main PCB from the housing to the tray, utilizing the vertical space and component arrangement on the tray's circuit board. This dimensional reorganization allows the PCB to be positioned closer to the optical pickup unit on the same tray assembly, reducing signal loss while maintaining adequate internal space through optimized component layout and spacing.
Data Source
AI summary
An optical disk drive including: a housing; a tray installed in the housing; an optical pickup unit mounted in the tray; and a guide shaft mounted in the tray such that the optical pickup unit and the guide shaft are configured such that the optical pickup unit is reciprocally movable along the guide shaft.